programming

# Programming Language-specific patterns and tooling for Go, Kotlin, PHP, Swift, and TypeScript. Identify the language, load matching deep references, follow the language section. ## Language Routing | Language | Agent | Section | |----------|-------|---------| | Go | golang-general-engineer | Go | | Kotlin | kotlin-general-engineer | Kotlin | | PHP | php-general-engineer | PHP | | Swift | swift-general-engineer | Swift | | TypeScript | typescript-frontend-engineer | TypeScript | If the request spans multiple languages, apply each relevant section. --- ## Go ### Style Precedence 1. Target repository's explicit rules and compatibility constraints. 2. Google Go Style Guide canonical rules. 3. Google Go Style Decisions normative guidance. 4. Google Go Style Best Practices non-canonical recommendations. 5. Task-specific deep references below. Prefer local consistency only where the Google guide allows judgment. Do not restyle existing code without cause. ### Workflow 1. Classify the task: testing, concurrency, error handling, code review, SAPCC conventions, or quality gate. 2. Load the matching deep reference. 3. Follow the reference's phases, gates, and completion criteria. For **testing**: table-driven tests with subtests, test helpers, mock injection. Run `go test ./...`. Load `references/go/testing.md`. For **concurrency**: goroutine lifecycle, sync primitives, context propagation, race detection. Run `go test -race`. Load `references/go/concurrency.md`. For **err...